Research on Digital Baseband Converting Methods in Interference Measurement System

2014 ◽  
Vol 716-717 ◽  
pp. 978-982
Author(s):  
Xiao Min Hou ◽  
Shao Jie Wei ◽  
Xin Lian
Keyword(s):  
Measurement System ◽  
Phase Structure ◽  
Filter Bank ◽  
Parallel Structure ◽  
Full Spectrum ◽  
Phase Filter ◽  
Interference Measurement ◽  
Mixing Method ◽  
Digital Baseband

Focused on DBBC(digital baseband converter) which is used in interferencemeasurement system, two typical digital baseband converting methods are introduced. Using parallel structure and poly-phase structure to improve the orthogonal mixing method, the method based on parallel conversion is proposed. Combining the efficient PFB(poly-phase filter bank) channelization with theflexible orthogonal mixing , the method combining PFB channelization with the orthogonal mixing is proposed. This method can realize full spectrum received.Considering the efficiency and power, the method combining PFB channelization with the orthogonal mixing is better.

scholarly journals Research on small lightweight electromagnetic interference measurement system based on patrol unmanned aerial vehicle

2021 ◽  
Vol 2108 (1) ◽  
pp. 012011
Author(s):  
Pingyuan Liu ◽  
Nian Wu ◽  
Junwen Yao ◽  
Xianbin Ke ◽  
Shiguang Bie ◽  
...  
Keyword(s):  
Transmission Line ◽  
Unmanned Aerial Vehicle ◽  
Measurement System ◽  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Full Spectrum ◽  
Observation Methods ◽  
Interference Measurement ◽  
Aerial Vehicle ◽  
Infrared Cameras

Abstract Unmanned aerial vehicle (UAV) has been widely used in power system inspection. Most of the existing UAVs are equipped with visible and infrared cameras for fast full spectrum photography and fault monitoring of transmission lines. When the transmission line has defects such as aging, broken strand and serious corrosion, the traditional image recognition, infrared and other observation methods can not identify these defects well. In order to realize the rapid detection and judgment of broken strand, this paper analyzes the characteristics of electromagnetic interference of transmission line, and constructs the electromagnetic interference measurement system based on patrol UAV. The research results of this paper can realize the real-time detection and alarm of broken strand, and provide technical support for line inspection.

scholarly journals Self-mixing interference measurement system of a fiber ring laser with ultra-narrow linewidth

2012 ◽  
Vol 20 (8) ◽  
pp. 8598 ◽  
Author(s):  
Liang Lu ◽  
Jingyu Yang ◽  
Longhua Zhai ◽  
Rui Wang ◽  
Zhigang Cao ◽  
...  
Keyword(s):  
Measurement System ◽  
Ring Laser ◽  
Narrow Linewidth ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Interference Measurement
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